Chemical Relationships Chemical Equations (previous version) by Anthony Carpi, Ph.D. Reading Quiz Teach with this 1. What is a chemical reaction? a process of bonding substances together a process that leads to filled valence shells a process that releases or consumes energy all of the choices 2. What is a chemical equation? a diatomic molecule a shorthand representation of a chemical bond a shorthand representation of a chemical reaction a substance 3. What are substances on the left side of a chemical equation called? electrons groups products reactants 4. What are substances on the right side of a chemical equation called? electrons groups products reactants 5. What does the number in front of the molecular symbol mean? It shows that there is only one molecule present in a reaction It shows the number of reactions that took place It shows the number of molecules in the reaction All of the choices 6. Can the subscripts in a chemical reaction be changed? Cannot be determined Maybe, depending on the energy released No, they define the molecules in the reaction Yes, to balance the equation 7. Chemical reactions proceed under the law of definite proportions: always cannot be determined never sometimes 8. 16.05 g of methane reacts completely with 64.00 g of oxygen to form carbon dioxide and water. What will be the total weight of the CO2 and H2O? 16.05 64 80.05 the weight cannot be determined 9. What is a limiting reactant? a reactant that is found in excess in a chemical reaction a reactant that is not present a reactant that will be consumed completely during a reaction all of the choices 10. When the equation below is balanced, the coefficient in front of carbon dioxide is C3H8 + O2 -> CO2 + H2O: 1 12 3 6 Score Quiz
